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Option 4 : 1, 2 and 3

The correct answer is 1, 2 and 3.

 

  • The periodical rise and fall of the sea level is known as tide.
  • The Moon's gravitational pull is the major cause of a tide. Hence statement 2 is correct.
  • Sun's gravitational pull and centrifugal force due to the gravitational pull of the earth to a lesser extent so causes types. Hence statements 1 and 3 are correct.
  • The movement of water is caused by Meteorological effects like winds and atmospheric pressure change and is known as surges. 
  • The tide-generating force is the difference between the gravitational attraction of the Moon and the centrifugal force.  
  • Tides vary in frequency, direction, and movement from place to place and from time to time.
  • Based on frequency, they are classified into the semi-diurnal, diurnal, and mixed tide.  
  • Springtide: when the sun, moon, and earth are in a straight line the height of the tide is higher and this occurs on a full moon period.
  • Neap tide: when the moon and the sun are at right angles to each other the forces of the sun and the moon tend to counteract each other.  It occurs twice a month.
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